A water and fertilizer integration assisted aerial string-type layering method for tea tree breeding is characterized in that advantages of facility tea gardens widely distributed in the north China are fully utilized, the production of tea leaves in the tea gardens and the breeding of tea seedlings can be carried out simultaneously, direct nutrition supplementing is carried out on tea branches through fertilizer and water integration, the production quality and efficiency of fresh tea leaves in the tea gardens are improved, constructing a special seedling raising shed is not required, building a special parent garden and breeding nursery is not required either, and therefore land resources and investment are saved, one-year single breeding of northern clone tea seedlings is achieved, andthe breeding period is short; a working bag is used for carrying out rapid operation in terms of technical operation, a leash can be directly pulled out to arrive at skin breaking, the working bag isbound and fixed on branches through the leash, the traditional scion cutting and cuttage procedures are removed, and labor cost is saved; tea seedlings are bred and rooted on tea mother plants, the root system occurs in the working bag, the tea seedling buds and roots are complete, the seedling rate is high, the seedling period is in spring and summer, and the transplanting climate is suitable.